Fix bug 953 - "Segfault when QObject is garbage collected after QTimer.singeShot"

Reviewer: Renato Araújo <renato.filho@openbossa.org>
          Luciano Wolf <luciano.wolf@openbossa.org>

tests/QtCore/bug_953.py

@@ -0,0 +1,18 @@
+from PySide.QtCore import *
+
+class Dispatcher(QObject):
+    _me = None
+
+    def __init__(self):
+        super(Dispatcher, self).__init__()
+        self._me = self
+        QTimer.singleShot(0, self._finish)
+
+    def _finish(self):
+        del self._me # It can't crash here!
+        QTimer.singleShot(10, QCoreApplication.instance().quit)
+
+if __name__ == '__main__':
+    app = QCoreApplication([])
+    Dispatcher()
+    app.exec_()